OK, the technique is very important. Best if someone rolls for you (preferably professional) if not brother, sister, neighbour.... but you need counter traction in some areas and pinching up in others. By stretching your skin and applying firm pressure, it will help. Needle depth is vital....
Thank you for your question. Derma roller is very good for acne scars as it can improve the texture and the appearance. The length of the needle all depends on what reaction you will have. Derma roller should be from .5-1.0 in length. With home derma rollers all you should experience...
I have my patients micro-needle their skin at home two to three times per week using a special hand held device that we manufacture. It is not a derma roller, as it uses a vertical "stamping motion" which gives a much more even pattern of vertical needle insertions into the skin as well as a...